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Salicylic Acid Signals Recruit Soil Microorganisms to Cooperate Resistance to Watermelon Fasurium wilt
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  • Feiying Zhu,
  • Yong Fang,
  • Zhiwei Wang,
  • Xi Chen,
  • Zhengliang Luo,
  • Langtao Xiao,
  • Ruozhong Wang
Feiying Zhu
Hunan Agricultural University
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Yong Fang
Hunan Academy of Agricultural Sciences
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Zhiwei Wang
Hunan Academy of Agricultural Sciences
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Xi Chen
Hunan Academy of Agricultural Sciences
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Zhengliang Luo
Hunan Academy of Agricultural Sciences
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Langtao Xiao
Hunan Agricultural University
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Ruozhong Wang
Hunan Agricultural University

Corresponding Author:[email protected]

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Abstract

In order to find out the mechanism of how salicylic acid signal recruit soil microorganisms to explain their cooperate resistance to Fusarium wilt disease in watermelon plants. In this experiment, we have examined the soil microbial diversity at three different sampling times after salicylic acid application by metagenomic sequencing using Illumina HiSeq platform. The results showed that the incidence of Watermelon Fusarium Wilt was significantly lower than control group after SA application. Collectively, our results indicated that SA signal may activate the immune signal in watermelon plants by mediating rhizosphere microbial community to cooperate enhancing resistance to disease. Notably, SA signal have highly increased the distribution of resistance genes from GH (Glycoside Hydrolases) and PL (Polysaccharide Lyases) after 3 days post inoculation of FON1, and those corresponding resistance genes may came from Proteobacteria because its highest relative abundance. Therefore, our results suggested that the induced resistant observed in watermelon against Fusarium wilt might be a case of cooperate resistance dependent on salicylic acid signal to recruit soil microorganisms.